81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/* DWARF2 frame unwind data structure.
|
|
Copyright (C) 1997-2016 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3, or (at your option)
|
|
any later version.
|
|
|
|
GCC is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
|
License for more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/* The result of interpreting the frame unwind info for a frame.
|
|
This is all symbolic at this point, as none of the values can
|
|
be resolved until the target pc is located. */
|
|
typedef struct
|
|
{
|
|
/* Each register save state can be described in terms of a CFA slot,
|
|
another register, or a location expression. */
|
|
struct frame_state_reg_info
|
|
{
|
|
struct {
|
|
union {
|
|
_Unwind_Word reg;
|
|
_Unwind_Sword offset;
|
|
const unsigned char *exp;
|
|
} loc;
|
|
enum {
|
|
REG_UNSAVED,
|
|
REG_SAVED_OFFSET,
|
|
REG_SAVED_REG,
|
|
REG_SAVED_EXP,
|
|
REG_SAVED_VAL_OFFSET,
|
|
REG_SAVED_VAL_EXP,
|
|
REG_UNDEFINED
|
|
} how;
|
|
} reg[__LIBGCC_DWARF_FRAME_REGISTERS__+1];
|
|
|
|
/* Used to implement DW_CFA_remember_state. */
|
|
struct frame_state_reg_info *prev;
|
|
|
|
/* The CFA can be described in terms of a reg+offset or a
|
|
location expression. */
|
|
_Unwind_Sword cfa_offset;
|
|
_Unwind_Word cfa_reg;
|
|
const unsigned char *cfa_exp;
|
|
enum {
|
|
CFA_UNSET,
|
|
CFA_REG_OFFSET,
|
|
CFA_EXP
|
|
} cfa_how;
|
|
} regs;
|
|
|
|
/* The PC described by the current frame state. */
|
|
void *pc;
|
|
|
|
/* The information we care about from the CIE/FDE. */
|
|
_Unwind_Personality_Fn personality;
|
|
_Unwind_Sword data_align;
|
|
_Unwind_Word code_align;
|
|
_Unwind_Word retaddr_column;
|
|
unsigned char fde_encoding;
|
|
unsigned char lsda_encoding;
|
|
unsigned char saw_z;
|
|
unsigned char signal_frame;
|
|
void *eh_ptr;
|
|
} _Unwind_FrameState;
|
|
|